Add boto3 and DuckDB examples to the S3 docs (#2608)
Add two verified examples to the Examples section of the Storage Buckets
S3 page (boto3 read/write, DuckDB query a bucket), plus a one-line pointer
to Access Patterns so S3 reads as one of several access methods. The DuckDB
note documents the required URL_STYLE 'path' setting (without it, virtual-
hosted-style addressing fails to resolve).
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
